by Keyword: Microtissue
Rubi-Sans, G, Cano-Torres, I, Perez-Amodio, S, Blanco-Fernandez, B, Mateos-Timoneda, MA, Engel, E, (2021). Development and Angiogenic Potential of Cell-Derived Microtissues Using Microcarrier-Template Biomedicines 9, 232 
Tissue engineering and regenerative medicine approaches use biomaterials in combination with cells to regenerate lost functions of tissues and organs to prevent organ transplantation. However, most of the current strategies fail in mimicking the tissue's extracellular matrix properties. In order to mimic native tissue conditions, we developed cell-derived matrix (CDM) microtissues (MT). Our methodology uses poly-lactic acid (PLA) and Cultispher(R) S microcarriers' (MCs') as scaffold templates, which are seeded with rat bone marrow mesenchymal stem cells (rBM-MSCs). The scaffold template allows cells to generate an extracellular matrix, which is then extracted for downstream use. The newly formed CDM provides cells with a complex physical (MT architecture) and biochemical (deposited ECM proteins) environment, also showing spontaneous angiogenic potential. Our results suggest that MTs generated from the combination of these two MCs (mixed MTs) are excellent candidates for tissue vascularization. Overall, this study provides a methodology for in-house fabrication of microtissues with angiogenic potential for downstream use in various tissue regenerative strategies.
JTD Keywords: angiogenesis, cell-derived matrix, cultispher® s, microtissue, poly-lactic acid microcarriers, Angiogenesis, Cell-derived matrix, Cultispher (r) s, Microtissue, Poly-lactic acid microcarriers, Rat bone marrow mesenchymal stem cells
Blanco-Fernandez, B, Cano-Torres, I, Garrido, C, Rubi-Sans, G, Sanchez-Cid, L, Guerra-Rebollo, M, Rubio, N, Blanco, J, Perez-Amodio, S, Mateos-Timoneda, MA, Engel, E, (2021). Engineered microtissues for the bystander therapy against cancer Materials Science & Engineering C-Materials For Biological Applications 121, 111854
© 2021 Elsevier B.V. Thymidine kinase expressing human adipose mesenchymal stem cells (TK-hAMSCs) in combination with ganciclovir (GCV) are an effective platform for antitumor bystander therapy in mice models. However, this strategy requires multiple TK-hAMSCs administrations and a substantial number of cells. Therefore, for clinical translation, it is necessary to find a biocompatible scaffold providing TK-hAMSCs retention in the implantation site against their rapid wash-out. We have developed a microtissue (MT) composed by TKhAMSCs and a scaffold made of polylactic acid microparticles and cell-derived extracellular matrix deposited by hAMSCs. The efficacy of these MTs as vehicles for TK-hAMSCs/GCV bystander therapy was evaluated in a rodent model of human prostate cancer. Subcutaneously implanted MTs were integrated in the surrounding tissue, allowing neovascularization and maintenance of TK-hAMSCs viability. Furthermore, MTs implanted beside tumors allowed TK-hAMSCs migration towards tumor cells and, after GCV administration, inhibited tumor growth. These results indicate that TK-hAMSCs-MTs are promising cell reservoirs for clinical use of therapeutic MSCs in bystander therapies.
JTD Keywords: adipose mesenchymal stem cells, bioluminescence, bystander therapy, cancer, Adipose mesenchymal stem cells, Bioluminescence, Bystander therapy, Cancer, Self-assembled cell-based microtissues
